公开(公告)号：WO2012168801A1

公开(公告)日：2012-12-13

申请号：PCT/IB2012/051674

申请日：2012-04-04

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong

Inventor： BAI, Chunlong

IPC: H03F1/32

CPC classification number: H03F1/3252 ,  H03F3/211 ,  H03F3/24 ,  H04B7/0615 ,  H04L2025/03426

Abstract: Methods and apparatus are disclosed for predistorting input data signals to a MIMO transmitter to compensate for distortions introduced by the MIMO transmitter. Distortions introduced to data signals by a MIMO transmitter include crosstalk between multiple transmit paths and non-linearities introduced by power amplifiers. In an exemplary predistorter, post-amplifier crosstalk is compensated for by a first matrix operation before distortions introduced by power amplifiers are predistorted by power amplifier predistorters. After the power amplifier predistorters, pre-amplifier crosstalk is compensated for by a second matrix operation.

Abstract translation: 公开了用于将输入数据信号预失真到MIMO发射机以补偿由MIMO发射机引入的失真的方法和装置。 由MIMO发射机引入到数据信号的失真包括多个发射路径之间的串扰和由功率放大器引入的非线性。 在示例性的预失真器中，由功率放大器引入的失真由功率放大器预失真器预失真之前通过第一矩阵运算补偿后置放大器串扰。 在功率放大器预失真器之后，通过第二矩阵运算补偿前置放大器串扰。

公开(公告)号：WO2013108094A1

公开(公告)日：2013-07-25

申请号：PCT/IB2012/056807

申请日：2012-11-28

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong

Inventor： BAI, Chunlong

IPC: H03F1/32

CPC classification number: H04B1/0475 ,  H03F1/3252 ,  H03F1/3258 ,  H03F1/3294

Abstract: A method and system for pre-distorting a dual band signal to compensate for distortion of a non-linear power amplifier in a radio transmitter are disclosed. In one embodiment, a first and second signal of the dual band signal are up-sampled at a sampling rate that is based at least in part on the bandwidth of at least one of the first and second signals and based at least in part on an intermediate frequency by which the first and second signal are tuned before pre-distortion of the tuned signals.

Abstract translation: 公开了一种用于预失真双频带信号以补偿无线电发射机中的非线性功率放大器的失真的方法和系统。 在一个实施例中，以至少部分地基于第一和第二信号中的至少一个的带宽的采样速率对双频带信号的第一和第二信号进行上采样，并且至少部分地基于 在调谐信号的预失真之前，第一和第二信号被调谐的中频。

公开(公告)号：WO2013046183A1

公开(公告)日：2013-04-04

申请号：PCT/IB2012/055213

申请日：2012-09-28

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong ,  MORRIS, Bradley, John

Inventor： BAI, Chunlong ,  MORRIS, Bradley, John

IPC: H03F1/32 ,  H04B1/04 ,  H04B1/00

CPC classification number: H03F1/3247 ,  H04B1/0075 ,  H04B1/0475 ,  H04B1/0483

Abstract: Systems and methods for providing digital predistortion to compensate for a non-linearity of a power amplifier in a dual-band transmitter are disclosed. In one embodiment, a first baseband signal is tuned to a first intermediate frequency to provide a first intermediate frequency signal. Likewise, a second baseband signal is tuned to a second intermediate frequency to provide a second intermediate frequency signal. The first and second intermediate frequency signals are combined to provide a combined intermediate frequency signal. The combined intermediate frequency signal is then predistorted to compensate for the non-linearity of the power amplifier in the transmitter to thereby provide a predistorted signal. In one embodiment, a separation between the first and second intermediate frequencies and/or a sampling rate for predistortion is minimized based on a target intermodulation order for the predistortion.

Abstract translation: 公开了用于提供数字预失真来补偿双频带发射机中的功率放大器的非线性的系统和方法。 在一个实施例中，将第一基带信号调谐到第一中间频率以提供第一中频信号。 类似地，第二基带信号被调谐到第二中频以提供第二中频信号。 第一和第二中频信号被组合以提供组合的中频信号。 然后组合的中频信号被预失真以补偿发射机中的功率放大器的非线性，从而提供预失真的信号。 在一个实施例中，基于用于预失真的目标互调顺序，使第一和第二中频之间的间隔和/或预失真的采样率最小化。

公开(公告)号：WO2013042031A1

公开(公告)日：2013-03-28

申请号：PCT/IB2012/054918

申请日：2012-09-17

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  SMILEY, Russell ,  BAI, Chunlong

Inventor： SMILEY, Russell ,  BAI, Chunlong

IPC: H03F1/32

CPC classification number: H03F1/3247 ,  H03F1/3229 ,  H03F3/189 ,  H03F3/245 ,  H03F2201/3212

Abstract: In accordance with the present disclosure, there is provided a predistorter combined with a feedforward corrector that addresses power dissipation of the feedforward error path while maintaining a sufficiently simple digital predistortion model so as to further minimize power dissipation without sacrificing linearity.

Abstract translation: 根据本公开，提供了一种与前馈校正器组合的预失真器，其用于解决前馈误差路径的功率耗散，同时保持足够简单的数字预失真模型，以便在不牺牲线性度的情况下进一步最小化功率耗散。

公开(公告)号：WO2013136206A1

公开(公告)日：2013-09-19

申请号：PCT/IB2013/051465

申请日：2013-02-22

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong

Inventor： BAI, Chunlong

IPC: H03F1/32 ,  H03F3/189 ,  H03F3/24 ,  H04B1/00 ,  H04B1/04 ,  H04L27/36

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/3258 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/111 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B1/0067 ,  H04B1/0475 ,  H04B1/0483 ,  H04B2001/0425 ,  H04L27/367

Abstract: A method and system for pre-distorting a dual band signal to compensate for distortion of a non-linear power amplifier in a radio transmitter are disclosed. In one embodiment, the first signal of the dual band signal is tuned to a first intermediate frequency to produce a first tuned signal and the second signal of the dual band signal is tuned to minus the intermediate frequency to produce a second tuned signal. A single input pre-distorter pre-distorts the sum of the first tuned signal and the second tuned signal. The coefficients of the pre-distorter are obtained from a one- dimensional look-up table.

Abstract translation: 公开了一种用于预失真双频带信号以补偿无线电发射机中的非线性功率放大器的失真的方法和系统。 在一个实施例中，将双频带信号的第一信号调谐到第一中频以产生第一调谐信号，并将双频带信号的第二信号调谐到中间频率以产生第二调谐信号。 单输入预失真器预先歪曲第一调谐信号和第二调谐信号的和。 预失真器的系数是从一维查找表中获得的。

公开(公告)号：WO2012176119A2

公开(公告)日：2012-12-27

申请号：PCT/IB2012/053085

申请日：2012-06-19

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong ,  SMILEY, Russell

Inventor： BAI, Chunlong ,  SMILEY, Russell

IPC: H04L27/36

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F3/24 ,  H03F3/68 ,  H03F2201/3212 ,  H04L25/03343

Abstract: Embodiments of a centralized predistortion system and corresponding adaptive predistortion processes are disclosed. In general, a central node includes one or more centralized predistortion components that enable predistortion for one or more remote transmit chains in order to compensate for non-linearity of power amplifiers in the one or more remote transmit chains. For instance, in one embodiment, the central node is a hub base station and the one or more remote transmit chains are included in one or more transmitters at one or more satellite base stations.

Abstract translation: 公开了集中预失真系统和相应的自适应预失真过程的实施例。 通常，中央节点包括一个或多个集中式预失真分量，其能够对一个或多个远程发射链进行预失真，以补偿一个或多个远程发射链中的功率放大器的非线性。 例如，在一个实施例中，中心节点是集线器基站，并且一个或多个远程发射链包括在一个或多个卫星基站的一个或多个发射机中。

公开(公告)号：WO2013136226A1

公开(公告)日：2013-09-19

申请号：PCT/IB2013/051754

申请日：2013-03-05

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： BAI, Chunlong

IPC: H03F1/32 ,  H04L27/36

CPC classification number: H03F1/3247 ,  H03F2201/3227 ,  H04L27/368

Abstract: Systems and methods are disclosed for compensating for non-linearity of a power amplifier using space mapping based predistortion. In one embodiment, a transmitter includes a power amplifier that amplifies a power amplifier input signal, a predistorter that effects predistortion of the power amplifier input signal to compensate for a non-linear characteristic of the power amplifier using a space mapping based model of an inverse of the non-linear characteristic of the power amplifier, and an adaptation sub-system that adaptively configures the space mapping based model of the non-linear characteristic of the power amplifier. In one embodiment, the adaptation sub-system adaptively configures a space mapping based model of the non-linear characteristic of the power amplifier and adaptively configures the space mapping based model of the inverse of the non-linear characteristic of the power amplifier based on the space mapping based model of the non-linear characteristic of the power amplifier.

Abstract translation: 公开了用于补偿使用基于空间映射的预失真的功率放大器的非线性度的系统和方法。 在一个实施例中，发射机包括放大功率放大器输入信号的功率放大器，预失真器，其利用功率放大器输入信号的预失真来补偿功率放大器的非线性特性，使用基于空间映射的反相模型 功率放大器的非线性特性的自适应子系统，以及自适应地配置基于功率放大器的非线性特性的基于空间映射的模型的自适应子系统。 在一个实施例中，自适应子系统自适应地配置基于功率放大器的非线性特性的基于空间映射的模型，并且基于功率放大器的非线性特性的逆的自相应自适应地配置基于空间映射的模型 基于空间映射的功率放大器非线性特性模型。

公开(公告)号：WO2013093862A2

公开(公告)日：2013-06-27

申请号：PCT/IB2012/057569

申请日：2012-12-20

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： BAI, Chunlong ,  JIAN, Chunyun ,  SICH, Edward

CPC classification number: H03F3/245 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H04B1/0475 ,  H04B2001/0425

Abstract: Systems and methods for compensating for non-linearity of a non-linear subsystem using predistortion are disclosed. In one embodiment, a system includes a non-linear subsystem and a predistorter configured to effect predistortion of an input signal of the non-linear subsystem such that the predistortion compensates for a non-linear characteristic of the non-linear subsystem. In addition, the system includes a narrowband filter that filters a feedback signal that is representative of an output signal of the non-linear subsystem to provide a filtered feedback signal, and an adaptor that adaptively configures the predistorter based on the filtered feedback signal and a reference signal that is representative of an input signal of the non-linear subsystem. By utilizing the filtered feedback signal, rather than the feedback signal, a complexity, and therefore, cost of the adaptor is substantially reduced.

Abstract translation: 公开了用于使用预失真来补偿非线性子系统的非线性的系统和方法。 在一个实施例中，一种系统包括非线性子系统和预失真器，其被配置为实现非线性子系统的输入信号的预失真，使得预失真补偿非线性子系统的非线性特性。 另外，该系统包括窄带滤波器，该窄带滤波器对表示非线性子系统的输出信号的反馈信号进行滤波以提供经滤波的反馈信号，以及适配器，其基于经滤波的反馈信号自适应地配置预失真器， 该参考信号表示非线性子系统的输入信号。 通过利用经滤波的反馈信号而不是反馈信号，复杂性以及因此适配器的成本大大降低。

公开(公告)号：WO2013128300A1

公开(公告)日：2013-09-06

申请号：PCT/IB2013/050279

申请日：2013-01-11

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： KILAMBI, Sai Mohan ,  ZHANG, Yuxing ,  BAI, Chunlong

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425

Abstract: The present disclosure generally relates to predistortion that compensates for non-linearity of a power amplifier as well as short-term and long-term memory effects of the power amplifier. In one embodiment, a transmitter includes a power amplifier that amplifies a power amplifier input signal to provide a power amplifier output signal, a predistortion sub-system that effects predistortion of the power amplifier input signal to compensate for non-linearity of the power amplifier and memory effects of the power amplifier, and a adaptation sub-system that adaptively configures the predistortion sub-system. The predistortion sub-system includes a memory-less predistortion component that compensates for the non- linearity of the power amplifier, a Finite Impulse Response (FIR) filter that compensates for short-term memory effects of the power amplifier, and an Infinite Impulse Response (IIR) filter that compensates for long-term memory effects of the power amplifier.

Abstract translation: 本公开通常涉及补偿功率放大器的非线性以及功率放大器的短期和长期记忆效应的预失真。 在一个实施例中，发射机包括放大功率放大器输入信号以提供功率放大器输出信号的功率放大器，预失真子系统，其实现功率放大器输入信号的预失真以补偿功率放大器的非线性， 功率放大器的记忆效应以及自适应地配置预失真子系统的适配子系统。 预失真子系统包括补偿功率放大器的非线性的无内存预失真分量，补偿功率放大器的短期记忆效应的有限脉冲响应（FIR）滤波器和无限脉冲响应 （IIR）滤波器，补偿功率放大器的长期记忆效应。

公开(公告)号：WO2014122543A1

公开(公告)日：2014-08-14

申请号：PCT/IB2014/058342

申请日：2014-01-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： BAI, Chunlong

IPC: H03H9/02 ,  H03H9/64

CPC classification number: H03H9/02992 ,  H03H3/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/6409

Abstract: A method and system for providing a surface acoustic wave band reject filter are disclosed. According to one aspect, a surface acoustic wave band reject filter (34) includes a substrate (24) having electrode bars and bonding pads (36) formed on the substrate (24). The filter (34) further includes at least one die (26) having a side facing the substrate (24). A plurality of surface acoustic wave resonators (10) are formed on the at least one die (26) formed on the substrate (24). Solder balls (22) formed on a side of the at least one die (26) facing the substrate (24) are positioned to engage bonding pads on the substrate. The plurality of surface acoustic wave resonators (10) collectively exhibit a band reject filter response.

Abstract translation: 公开了一种用于提供表面声波阻带滤波器的方法和系统。 根据一个方面，声表面波阻带滤波器（34）包括具有形成在基板（24）上的电极棒和接合焊盘（36）的基板（24）。 过滤器（34）还包括具有面向衬底（24）的一侧的至少一个管芯（26）。 在形成在基板（24）上的至少一个模具（26）上形成多个声表面波谐振器（10）。 形成在面向衬底（24）的至少一个管芯（26）的一侧上的焊球（22）被定位成接合衬底上的接合焊盘。 多个表面声波谐振器（10）共同呈现带阻滤波器响应。